题目内容
脱式能简要简
|
|
|
|
(1)
÷[(
+
)×
]
=
÷[
×
],
=
÷
,
=3;
(3)
-
×
+
÷2
=
-
×
+
×
,
=(1-
+
)×
,
=1×
,
=
;
(3)
×98
=
×(99-1),
=
×99-
×1,
=98-
,
=97
;
(4)
÷
+
×
+
÷
=
×
+
×
+
×10,
=(
+
+10)×
,
=(1+10)×
,
=11×
,
=5.
| 1 |
| 5 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
=
| 1 |
| 5 |
| 13 |
| 15 |
| 1 |
| 13 |
=
| 1 |
| 5 |
| 1 |
| 15 |
=3;
(3)
| 1 |
| 13 |
| 1 |
| 13 |
| 1 |
| 2 |
| 1 |
| 13 |
=
| 1 |
| 13 |
| 1 |
| 13 |
| 1 |
| 2 |
| 1 |
| 13 |
| 1 |
| 2 |
=(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 13 |
=1×
| 1 |
| 13 |
=
| 1 |
| 13 |
(3)
| 98 |
| 99 |
=
| 98 |
| 99 |
=
| 98 |
| 99 |
| 98 |
| 99 |
=98-
| 98 |
| 99 |
=97
| 1 |
| 99 |
(4)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
| 5 |
| 11 |
| 1 |
| 10 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=(1+10)×
| 5 |
| 11 |
=11×
| 5 |
| 11 |
=5.
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